Influence of Ionic Strength on Electrochemical Responses of Myoglobin Loaded in Polysaccharide Layer-by-Layer Assembly Films

✍ Scribed by Yan Liu; Hongyun Liu; Xihong Guo; Naifei Hu

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 489 KB
• Volume: 22
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.201000039

✦ Synopsis

Abstract

Two polysaccharides hydroxyethyl cellulose ethoxylate (HECE) and hyaluronic acid (HA) were assembled into {HECE/HA}~n~ layer‐by‐layer films on electrodes. The films were then immersed in myoglobin (Mb) solutions to load Mb into the films. The Mb‐loaded films showed a nearly reversible cyclic voltammetric (CV) peak pair at −0.34 V vs. SCE in pH 7.0 buffers. The effect of ionic strength in Mb loading solutions and CV testing solutions on the CV response of the films was investigated. The direct electrochemistry of Mb loaded in the films could also be used to electrocatalyze the reduction of oxygen and H~2~O~2~ in solution.